The name of this species is officially Acalolepta longicornis (Thomson,1865). The specimens from Irian Jaya belong to the nominotypical form.
The revision of this group, The Acalolepta australis species-group, with revalidation of Dihammus Thomson, 1864 as a subgenus (Coleoptera, Cerambycidae). Les Cahiers Magellanes 31, can be requested here.